Reconfigurable terahertz light harvesting with MoTe2 hybrid metasurface

Near-perfect light harvesting of a metasurface-based absorber paves the way for achieving numerous potential applications in sensing, cloaking, and photovoltaics. Here, we present a reconfigurable perfect absorber based on a molyb-denum ditelluride (MoTe2) hybrid metasurface at terahertz (THz) frequency. By investigating the optical response of metasurface-based absorbers, a reconfigurable switching of dual-frequency perfect absorption to a new single-frequency absorption takes place when light illuminates MoTe2. More-over, the absorption mechanism of the hybrid metasurface is well demonstrated with the analytical coupled-dipole model and impedance analysis. The proposed reconfigurable THz meta-absorber provides a new, to the best of our knowledge, route for active radar stealth, frequency-selective detection, and next-generation wireless communication. (c) 2023 Optica Publishing Group https://doi.org/10.1364/OL.481967

Automated summary

Near-perfect light harvesting can be achieved with a metasurface-based absorber, which has numerous potential applications in sensing, cloaking, and photovoltaics. In this study, a reconfigurable perfect absorber based on a MoTe2 hybrid metasurface at terahertz frequency is presented. The optical response of the metasurface-based absorber shows a reconfigurable switching from dual-frequency perfect absorption to a new single-frequency absorption when illuminated by light. The absorption mechanism of the hybrid metasurface is well demonstrated with the analytical coupled-dipole model and impedance analysis. The proposed reconfigurable THz meta-absorber provides a new route for active radar stealth, frequency-selective detection, and next-generation wireless communication.